package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.RequestBody;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void employeeAdd(EmployeeDTO employeeDTO) {
        //1.将dto转为entity补充缺失属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex((PasswordConstant.DEFAULT_PASSWORD).getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //从currentLocal变量获取登录的员工id
        Long loginId = BaseContext.getCurrentId();
        employee.setCreateUser(loginId);
        employee.setUpdateUser(loginId);
        //2.调用mapper添加员工
        employeeMapper.employeeAdd(employee);
    }

    /**
     * 员工信息分页查询
     * @param dto
     */
    @Override
    public PageResult page(EmployeePageQueryDTO dto) {
        //1.设置分页参数
        PageHelper.startPage(dto.getPage(),dto.getPageSize());

        //2.调用mapper的查询方法，并强转返回类型为Page
        Page<Employee> page = employeeMapper.list(dto.getName());

        //3.封装PageResult对象并返回
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void enableorDisable(int status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

    @Override
    public void update(EmployeeDTO dto) {
        //根据id拿到员工信息
        Employee emp = employeeMapper.getById(dto.getId());
        //将更新的信息属性拷贝给到entity
        BeanUtils.copyProperties(dto,emp);
        //补充更新时间和用户
        emp.setUpdateTime(LocalDateTime.now());
        emp.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(emp);
    }

    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }
}
